How can i call a javascript function from a php file?

Question

In my PHP-Code i have got a variable $password, which i want to edit in a javascript function which is located in a .js File. That means passing $password as a parameter to the function and saving the return value into the variable.

How can I do this?

You can't. Implement an equivalent function in PHP instead. – nnnnnn Feb 08 '16 at 13:49 — nnnnnn, Feb 08 '16 at 13:49
@RaviHirani I don't know how to use AJAX :/ – Kopse Feb 08 '16 at 13:49 — Kopse, Feb 08 '16 at 13:49

score 0 · Answer 1 · answered Feb 08 '16 at 14:09

0

I know you can try to add this to your PHP code:

echo '<script type="text/javascript"> drawChart(); </script>';

and it will access your script, however you should really try to do it with AJAX.

Hope it works for you

answered Feb 08 '16 at 14:09

Gabriel Mendez

46
1
4

score 0 · Answer 2 · answered Feb 08 '16 at 14:12

Here is how to do it with jQuery and Ajax :

getPassword.php

<?php
session_start();

$_SESSION['password'] = "whatever";

header("Content-Type: application/json");
echo json_encode(array("password" => $_SESSION['password']));
?>

Javascript part, don't forget to include jQuery

    // Let's get the password !
    $.ajax({url: "http://yoursite/getPassword.php", dataType: "JSON"}).done(function(response) {
        // Stocking the password here
        var password = response.password;

        // Do whatever you wan't with the password
        password = processPassword(password);

        // Post the password to php
        $.post("http://yoursite/setPassword.php", {password: password});
    });

And finally, setPassword.php

<?php

session_start();

if (!empty($_POST['password'])) {
    // Retrieving the password sent by ajax in session
    $_SESSION['password'] = $_POST['password'];
}

How can i call a javascript function from a php file?

2 Answers2